117 lines
4.0 KiB
C#
117 lines
4.0 KiB
C#
//
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// System.Web.UI.SqlCacheDependency
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//
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// Authors:
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// Marek Habersack (mhabersack@novell.com)
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//
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// Copyright (C) 2008 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.Security.Permissions;
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using System.Data.SqlClient;
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using System.Web;
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namespace System.Web.Caching
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{
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[AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
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public sealed class SqlCacheDependency: CacheDependency
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{
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string uniqueId = Guid.NewGuid().ToString();
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[MonoTODO ("What to do with the sqlCmd?")]
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public SqlCacheDependency (SqlCommand sqlCmd)
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{
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if (sqlCmd == null)
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throw new ArgumentNullException ("sqlCmd");
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}
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[MonoTODO ("What are the params good for?")]
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public SqlCacheDependency (string databaseEntryName, string tableName)
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{
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if (databaseEntryName == null)
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throw new ArgumentNullException ("databaseEntryName");
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if (tableName == null)
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throw new ArgumentNullException ("tableName");
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}
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[MonoTODO ("Needs more testing - especially the return value and database+table lookup.")]
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public static CacheDependency CreateOutputCacheDependency (string dependency)
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{
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if (dependency == null)
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throw new HttpException (InvalidDependencyFormatMessage (dependency));
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if (dependency.Length == 0)
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throw new ArgumentException (InvalidDependencyFormatMessage (dependency), "dependency");
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int colon;
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string[] pairs = dependency.Split (';');
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var dependencies = new List <SqlCacheDependency> ();
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foreach (string pair in pairs) {
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colon = pair.IndexOf (':');
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if (colon == -1)
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throw new ArgumentException (InvalidDependencyFormatMessage (dependency), "dependency");
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dependencies.Add (new SqlCacheDependency (pair.Substring (0, colon), pair.Substring (colon + 1)));
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}
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switch (dependencies.Count) {
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case 0:
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return null;
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case 1:
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return dependencies [0];
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default:
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var acd = new AggregateCacheDependency ();
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acd.Add (dependencies.ToArray ());
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return acd;
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}
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}
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static string InvalidDependencyFormatMessage (string dependency)
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{
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return String.Format (@"The '' SqlDependency attribute for OutputCache directive is invalid.
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For SQL Server 7.0 and SQL Server 2000, the valid format is ""database:tablename"", and table name must conform to the format of regular identifiers in SQL. To specify multiple pairs of values, use the ';' separator between pairs. (To specify ':', '\' or ';', prefix it with the '\' escape character.)
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For dependencies that use SQL Server 9.0 notifications, specify the value 'CommandNotification'.", dependency);
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}
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protected override void DependencyDispose ()
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{
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// MSDN doesn't document it as being part of the class, but assembly
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// comparison shows that it does exist in this type, so we're just calling
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// the base class here
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base.DependencyDispose ();
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}
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public override string GetUniqueID ()
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{
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return uniqueId;
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}
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}
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}
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